DE357899C - Process for the production of nitrides - Google Patents

Process for the production of nitrides

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Publication number
DE357899C
DE357899C DES53648D DES0053648D DE357899C DE 357899 C DE357899 C DE 357899C DE S53648 D DES53648 D DE S53648D DE S0053648 D DES0053648 D DE S0053648D DE 357899 C DE357899 C DE 357899C
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DE
Germany
Prior art keywords
mixture
coal
nitrogen
production
nitrides
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DES53648D
Other languages
German (de)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SGN
Original Assignee
SGN
Publication date
Priority to DES53648D priority Critical patent/DE357899C/en
Application granted granted Critical
Publication of DE357899C publication Critical patent/DE357899C/en
Expired legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/06Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/072Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium
    • C01B21/0726Preparation by carboreductive nitridation
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/06Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • CCHEMISTRY; METALLURGY
    • C01INORGANIC CHEMISTRY
    • C01BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00Nitrogen; Compounds thereof
    • C01B21/06Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/072Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with aluminium

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Solid-Fuel Combustion (AREA)

Description

Verfahren zur Herstellung von Nitriden. .Die Erfindung betrifft ein Verfahren zur Herstellung von N itriden durch Einwirkenlassen eines. Stickstoffstromes auf ein Gemisch von Kohle und dem Oxyd oder oxvdischen Erz des zu nitrierenden Stoffes. Die Reaktion wird erhalten durch Verbindung der Erhitzung .durch Verbrennung mit elektrischer Heizung. Zu diesem Zweck wird die Beschickung, die aus festen, pulverförmigen, in Gasen .schwebenden Stoffen besteht, der Einwirkung der durch chemische Verbrennung erzeugten Hitze unterworfen und sodann durch einen elektrischen Lichtbogen geschleudert.Process for the production of nitrides. .The invention relates to a Process for the preparation of nitrides by exposure to a. Nitrogen flow on a mixture of coal and the oxide or oxide ore of the substance to be nitrided. The reaction is obtained by combining heating .by combustion with electric heating. For this purpose, the load, which consists of solid, powdery, substances suspended in gases, the effects of chemical combustion generated heat and then hurled by an electric arc.

Die Erfindung ist in. folgendem mehr im einzelnen mit Bezug auf die beiliegende Zeichnung beschrieben, die beispielsweise eine Vorrichtung, mit der das Verfahren ausgeführt werden kann, im Längsschnitt darstellt. Ebenfalls soll beispielsweise angenommen wenden, daß die vorzunehmende Reaktion die der Bildung von Aluminiumnitri.d durch Einwirkenlassen eines Stickstoffstromes auf eine Mischung von Kohle und Tonerde oder tonerdeh altigen Stoffen :sei.The invention is described in more detail below with reference to FIG accompanying drawing described, for example, a device with the the method can be carried out, represents in longitudinal section. Also should for example, assume that the reaction to be undertaken is that of formation of aluminum nitride by exposing a mixture to a stream of nitrogen of coal and clay or alumina-containing materials: be.

Die von irgendeiner Pumpe A, z. B. einer Fliehkraftpumpe gelieferte Gebläseluft geht zunächst in einen Vorwärmer B, der ihre Temperatur schon erhöht, und gelangt hierauf nach C. An dieser Stelle fällt in den Gasstrom aus einem Trichter D, dessen Förderung durch einen Verteiler E geregelt wird, ein Gemisch von !Kohle und tonerdehaltigen Stoffen. Die heiße Luft, die auf das .kohlehaltige Gemisch trifft, verbrennt die Kohle, wenigstens soweit die in der Luft enthaltene S;auerstoffmen:ge es zuläßt. Natürlich- muß das feste Gemisch eine solche Menge Kohle enthalten, daß nach der Verbrennung noch genug davon Übriäbleibt, -um die Reaktion der Bildung von Aluminiumnitrid in Gegenwart des .Stickstoffes -der Luft zu ermöglichen, die den zur Verbrennung erforderlichen Sauerstoff geliefert hat.The from any pump A, e.g. B. a centrifugal pump delivered Fan air first goes into a preheater B, which is already increasing its temperature, and then goes to C. At this point falls into the gas stream from a funnel D, the conveyance of which is regulated by a distributor E, is a mixture of! Coal and substances containing alumina. The hot air that meets the carbonaceous mixture the coal burns, at least as far as the oxygen contained in the air: ge it allows. Of course, the solid mixture must contain such an amount of coal that enough of it remains after the incineration, -for the reaction of formation of aluminum nitride in the presence of .Nitrogen -the air to enable the has supplied the oxygen required for combustion.

Infolge der oben erwähnten Verbrennung werden die (Gase und festen Stoffe auf verhältnismäßig (hohe Temperatiuren, beispielsweise z Zoo bis r 5oo° gebracht. Diese schon stark erhitzten Stoffe -,verden unter der Wirkung des Gasstromes in einen elektrischen Lichtbogen F .geworfen. Natürlich kann der Lichtbogen auch in dem verengten Teile des Verbrennungskanales sich befinden. Sie erreichen dann leicht die genügenden hohen Temperaturen, die eine rapide ,Bildung von Aluminiumnitrid ermöglichen. Nach der Reaktion fallen die festen Stoffe in die Kammer G, während die heißen Gase durch H entweichen, von wo sie aufgefangen werden können, um die Wärme wiederzugewinnen, die sie aus der Vorrichtung mitnehmen, und um das Kohlenoxyd nutzbar zu machen, das in ihnen enthalten ist. Man kann sie z. B. auf irgendeine bekannte Weise in B benutzen, um die in die Vorrichtung eintretende Luft vorzuwärmen.As a result of the above-mentioned combustion, the (gases and solid Substances to relatively (high temperatures, for example z zoo up to r 5oo ° brought. These substances, which are already strongly heated, are decayed under the effect of the gas flow thrown into an electric arc F. Of course, the arc can too in the narrowed part of the combustion channel. You then achieve easily the sufficiently high temperatures that a rapid, formation of aluminum nitride enable. After the reaction, the solids fall into chamber G while the hot gases escape through H, from where they can be captured to the To recover heat that they take with them from the device and to remove the carbon dioxide to make use of what is contained in them. You can z. B. on any use known manner in B to preheat the air entering the device.

Statt den zur Verbrennung notwendigen Kohleüberschuß den Reaktionsstoffen .beizumischen, kann man ihn vorher in dem heißen Luftstrom einführen. Man könnte auch statt der Kohle Kohlenoxyd, Kohlenwasserstoffe oder irgendeinen anderen Brennstoff verbrennen, und überhaupt könnte man die Flamme durch jede andere, aus einer exothermen chemischen Reaktion folgende Wärmeentwicklung ersetzen.Instead of the excess coal required for combustion, the reaction substances .bezumischen, you can introduce it into the hot air stream beforehand. One could also, instead of coal, carbon monoxide, hydrocarbons, or any other fuel burn, and in general, the flame could be replaced by any other, from an exothermic chemical reaction following heat generation.

Unter Umständen kann es vorteilhaft sein, den Lichtbogen F in dem verengten Teil des Kanals überspringen zu .lassen, in dem die Verbrennung stattfindet.Under certain circumstances, it can be advantageous to the arc F in the to skip the narrowed part of the duct in which the combustion takes place.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Nitri-,den durch Einwirkenlassen eines Stickstoffstromes auf ein Gemisch von Kohle und dem Oxyd oder dem oxydischen Erz des zu nitrierenden Stoffes unter Vorwärmung des Gemisches, dadurch gekennzeichnet, daß die ans pulverförmigen, in stickstoffhaltigen Gasen schwebenden .festen Stoffen. bestehende Beschickung der Wirkung der durch eine exotherme chemische Reaktion erzeugten Wärme unterwarfen :und sodann durch einen, elektrischen Lichtbogen geschleudiert wird. PATENT CLAIM: Process for the production of nitride by allowing a stream of nitrogen to act on a mixture of coal and the oxide or the oxidic ore of the substance to be nitrided while preheating the mixture, characterized in that the solid substances suspended in nitrogen-containing gases are in powder form . The existing charge is subjected to the action of the heat generated by an exothermic chemical reaction: and is then hurled by an electric arc.
DES53648D Process for the production of nitrides Expired DE357899C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DES53648D DE357899C (en) Process for the production of nitrides

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DES53648D DE357899C (en) Process for the production of nitrides

Publications (1)

Publication Number Publication Date
DE357899C true DE357899C (en) 1922-09-02

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DE (1) DE357899C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140558B (en) * 1959-11-11 1962-12-06 Kempten Elektroschmelz Gmbh Process for the production of nitrides of boron, aluminum or silicon or mixtures of these nitrides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1140558B (en) * 1959-11-11 1962-12-06 Kempten Elektroschmelz Gmbh Process for the production of nitrides of boron, aluminum or silicon or mixtures of these nitrides

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